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General Category => Modifications => Topic started by: MACHV on February 21, 2013, 07:47:12 PM

Title: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: MACHV on February 21, 2013, 07:47:12 PM
The more I read about what wheels work, the more confused i get on what needs machining and what does not. For sale near me, there is a 1990 gskr1100 rim with a perelli diablo 180/55-17 mounted. Is or is not this wheel going to be a direct bolt on with a some spacers added? Or does something need to be machined for fitment? machining needed for sprocket alignment? Will the tire sidewall clear the chain and guard?

If this is going to be real involved, I'm sticking with the 16" rim.
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: FJmonkey on February 21, 2013, 07:50:36 PM
Not sure of the 90, but I am sporting a 92' GSXR 750 rear wheel and just bolted it on..
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: MACHV on February 21, 2013, 07:53:30 PM
Really. But you are driving an 86 right?
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: FJmonkey on February 21, 2013, 07:57:47 PM
Quote from: MACHV on February 21, 2013, 07:53:30 PM
Really. But you are driving an 86 right?
Well if you ask Baldy I am not looking through the corners far enough and breaking too hard on entry (thanks Baldy). Is that what you mean? I tear up a set of Dunlop Q2's every 3.5K miles, mostly off the edges.
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: MACHV on February 21, 2013, 08:08:42 PM
No. I mean I thought the conversion wheel options change between your 86 and my 89. I did finally just find the PDF for the 1990 using the gsxr750 rim. Looks like I have more than just the rim and tire to worry about, ie changing the sprocket and using the gsxr caliper and drilling a hole for the torque arm.
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: FJmonkey on February 21, 2013, 08:11:38 PM
Quote from: MACHV on February 21, 2013, 08:08:42 PM
No. I mean I thought the conversion wheel options change between your 86 and my 89. I did finally just find the PDF for the 1990 using the gsxr750 rim. Looks like I have more than just the rim and tire to worry about, ie changing the sprocket and using the gsxr caliper and drilling a hole for the torque arm.
Aside from spacers you can use a passenger peg bolt location to mount the brake link arm. I chose to add a mount point on the swing arm....
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: MACHV on February 21, 2013, 08:23:23 PM
I was hoping this was going to be "old wheel off-new wheel on" simplicity. The wheel I am looking at has a 48 tooth sprocket and no brake parts for $175. Still have to powdercoat it too. Wanted to keep this under $200. Damn
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: FJmonkey on February 21, 2013, 08:25:43 PM
Er....You are gonna have to do more than that, but no machining is required... :pardon:
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: MACHV on February 21, 2013, 08:28:42 PM
Well I will keep a lookout for parts bikes then... or stick with the old rim. thanks.
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: craigo on February 21, 2013, 08:36:10 PM
Hi Mach,

I believe that was my PDF you are talking about. Yeah, the best way to go on the GSXR wheel swap is to get the whole wheel pack and brake items from a single donor bike. I got everything on Ebay from the same source. It cost me about $350 total with tire. As I have gone through 2 rears since I installed the gixxer wheel, and as I have seen that the 16" tires have gone upwards of $180 each, I have easily saved $100 on new rear tires and am now able to use a nice variety of radials.

Trust me, park the wheel till you get all the parts, you will not regret this mod. Look for someone selling any of the brake parts on ebay, and see if you can get all the parts from the same seller.  If you have to spend another $100, it'll be money in the bank after a few new tires.

Hope this helps,

CraigO
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: movenon on February 21, 2013, 08:46:35 PM
As I read it a 1990 GSXR 1100 rear wheel will work. As with any modification expect some small amount of engineering. It has been done many times and there are over 20 plus posts on just the GSXR rear wheel conversion.

Depending on the brake stay you may not have to drill or fabricate anything. The longer brake stay will bolt up to the lower foot peg bolt. You will have to get a longer 8mm bolt of course and lock nut.

The sprocket off an GSXR 1100 will not work, it takes an odd chain size. You will have to buy a GSXR 750 sprocket. You probably would not want the GSXR 1100 sprocket anyhow (to many teeth).

You will have to buy a few 20mm / 3/4 " washers as the GSXR wheel assembly is slightly shorter than the FJ.

The 180 55 17 tire is shorter than your stock tire. The photo below show the difference. If your bike is 89 or newer you can make new dog bones to adjust the height (more engineering). It's not hard and can be done with hand tools. If you have a pre 89 then I don't know how you can adjust the height.  New adjustable shock ??

Lots to think about on a cold winters night :)

All I can tell you is that a lot of FJ's have done the conversion and there is lots of help here. More info in the Files section in "Suspension related". Also use the search function. Hope it was helpful. I might have missed something so please read all the posts you can before you jump in.

(http://fjowners.com/gallery/4/1651_21_02_13_7_01_48.jpeg)
George
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: craigo on February 21, 2013, 09:05:28 PM
Quote from: FJmonkey on February 21, 2013, 07:57:47 PM
Quote from: MACHV on February 21, 2013, 07:53:30 PM
Really. But you are driving an 86 right?
Well if you ask Baldy I am not looking through the corners far enough and breaking too hard on entry (thanks Baldy). Is that what you mean? I tear up a set of Dunlop Q2's every 3.5K miles, mostly off the edges.

You say you're only getting 3500 miles out of a set of Q2's? Wow, I expected better than that. I have a set of ContiMotions on my bike now and have a tick over 4k on them. And I can see that they will last around another 1000 miles. And the front is not cupping like the Dunlop did. The rear on the other hand is.

You've rode with me and you see how I ride. I think you might like these as I will buy another set when worn. I'm really impressed with them and the great thing is they are cheap by comparison.

Just My opinion,

Ride safe and keep smiling  :good:

CraigO
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: craigo on February 21, 2013, 09:09:48 PM
Quote from: MACHV on February 21, 2013, 08:28:42 PM
Well I will keep a lookout for parts bikes then... or stick with the old rim. thanks.

Mach,

It's not as difficult as you may think. Someone told me not to over think this (Arnie?) and I went in to it and found it not much more difficult than changing a rear tire. I went from mock up to installation it was that simple. Plus, there are many of us here that will be more than happy to answer any questions.

CraigO
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: fj11.5 on February 22, 2013, 01:55:06 AM
I've combined 90/92 gsxr parts and fitted up the 5.5" rim to my 84 Fj,  only using a few spacers, and the long brake stay to a bolt on riders foot peg, wouldn't go back to a 16"
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: MACHV on February 22, 2013, 08:56:50 PM
HEY! The owner says he has the caliper, the bracket, torque arm, and chrome braided line to go with the rim and tire. All for $175!!! All that would be left is a new sprocket and spacers. Jump on it?
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: oldktmdude on February 22, 2013, 09:54:41 PM
Quote from: MACHV on February 22, 2013, 08:56:50 PM
HEY! The owner says he has the caliper, the bracket, torque arm, and chrome braided line to go with the rim and tire. All for $175!!! All that would be left is a new sprocket and spacers. Jump on it?
You have to ask?    :wacko3:
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: aviationfred on February 22, 2013, 10:03:23 PM
I did the GSXR rear wheel mod on my 89' using a 92 GSXR750 wheel, caliper, caliper holder, caliper torque arm and 43 tooth sprocket. The 1st link is what I used as a guide. I followed it exactly as it reads, with a slight difference on the torque arm mount.

http://www.fjowners.com/index.php?topic=2465.0 (http://www.fjowners.com/index.php?topic=2465.0)

I did use the front foot peg lower bolt hole. I don't know if it differs from the year models. The threaded hole in the frame for the foot peg bolt was drilled and threaded completely through the frame. There is about 3/8 of an inch of available threads. I used a bolt with 2 washers that left about 1/4 of an inch of threads and screwed the bolt in. When I fitted the torque arm, the caliper was pushed rearward of the axle. I had the torque arm shortened 2 1/4" so the caliper hung directly beneath the axle.

I did change to a 38 tooth sprocket. I still have the GSXR750 43 tooth sprocket. It is in good shape If anyone is interested.
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: chocker on February 22, 2013, 10:38:07 PM
Hi,
I just bought a nice JT 40t 530 conversion sprocket for the GSXR1100 1992 which would include your year steel for 42.50$ off Ebay. I had to ceross reference it with the JT website because when you see it on Ebay it states that it is for a Suzuki GT750 A,B 1973-1974. But again it all depends on your preference. If you are going to do the mod then maybe think of changing the front sprocket to an 18 tooth. Randy at RPMracingca.com has one for just under 30.00$. He's a great guy and very well known with the FJ crowd and may I say very helpful.

Thanks,
Mark
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: chocker on February 22, 2013, 10:40:11 PM
Sorry forgot to give the item number 330853561970 for the sprocket if you want to take a look on Ebay.

Mark
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: markmartin on February 22, 2013, 11:05:19 PM
Quote from: MACHV on February 22, 2013, 08:56:50 PM
HEY! The owner says he has the caliper, the bracket, torque arm, and chrome braided line to go with the rim and tire. All for $175!!! All that would be left is a new sprocket and spacers. Jump on it?

Yes
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: giantkiller on February 23, 2013, 11:35:15 AM
Got my latest one a 92 gsxr600 wheel (supposed to be a 93 750gsxr) complete with everything delivered to my door from California for $145. Wheel is mint except its blue. Just gotta watch ebay for a while
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: MACHV on February 23, 2013, 04:13:40 PM
Yep. Gonna do it. No brainier at this point. Thanks all. Mod will come mid season after the new clutch plates dissolve the back rubber :)
May be asking advice then on the subject but hopefully all this available info will make sense with the stuff in front of me.

Thanks again.





Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: movenon on February 23, 2013, 06:00:12 PM
Quote from: MACHV on February 23, 2013, 04:13:40 PM
Yep. Gonna do it. No brainier at this point. Thanks all. Mod will come mid season after the new clutch plates dissolve the back rubber :)
May be asking advice then on the subject but hopefully all this available info will make sense with the stuff in front of me.

Thanks again.

The black rubber thing is what motivated me to get into the conversion. Just about done and no problems locating parts and pieces. You just have to pay attention to what works. Sounds like you are getting the important stuff. Wheel, spacers (3 of them), cush hub, cush hub rubbers, brake caliper hanger, caliper, rotor and brake stay. As time go's along those parts will be harder to find. Even now to find a "good" wheel takes some shopping. If it's bent or dicked up then it shows up on flea bay...
George






Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: Brian S on February 28, 2013, 05:03:24 PM
If you don't mind a little drive north there is a 93 gsxr750 being parted out on milwaukee craigslist right now.
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: movenon on February 28, 2013, 05:19:27 PM
Quote from: Brian S on February 28, 2013, 05:03:24 PM
If you don't mind a little drive north there is a 93 gsxr750 being parted out on milwaukee craigslist right now.
The 93 GSXR 750 rim will work. Let me know if you get it. I would not plan on using the 93 brake caliper hanger or caliper. And you will have to but one spacer (10.00 item) cheaper than machining one down :).
George
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: giantkiller on February 28, 2013, 09:42:52 PM
Hey Brian. If you do go to Milwaukee. See if you can get him to throw in the caliper and bracket. If they aren't messed up. Ill give you $30 for them. The 93 750gsxr should be the same brake  as the 92 gsxr600 that I have. It has no torque arm. It just slides in a groove mounted on the inside of the swingarm. I want to convert the 86 to the same setup.
Let me know
Thanks Dan McCoy
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: movenon on February 28, 2013, 11:03:32 PM
Quote from: giantkiller on February 28, 2013, 09:42:52 PM
Hey Brian. If you do go to Milwaukee. See if you can get him to throw in the caliper and bracket. If they aren't messed up. Ill give you $30 for them. The 93 750gsxr should be the same brake  as the 92 gsxr600 that I have. It has no torque arm. It just slides in a groove mounted on the inside of the swingarm. I want to convert the 86 to the same setup.
Let me know
Thanks Dan McCoy

Yes, if its a 1993 750 GSXR the caliper mount slides or mounts into the GSXR swing arm. On my 1993 GSXR rim I obtained a caliper hanger and caliper from a 1991 GSXR 1000. Slips right into place with the '93 750 rim.  Is the 600 rim a different width than the 750 ? This modding thing is getting to be a full time job Dan. Took a front rim over today to be stripped and powder coated.... Also ordered a Motion Pro Chain alignment tool to help with setting the chain straight. Then there's a new chain, damn.... $$$  :yahoo:

This is work in progress information.......For anyone using a 1993 GSXR 750 rim.

In 1993 the GSXR 750 swingarm/rear suspension had a minor change in design. The rim is the same as a pre 1993.  The internal spacers (one in the wheel between the bearings and one in the inside of the cush hub) are the same dimensions. But the 2 outside spacers (sprocket side spacer and the thimble looking one on the brake side) are different in 1993.
The 1993 and newer Left spacer is long and the thimble one on the right is short. This combo will not work, it puts the wheel way to far to the right in the FJ swingarm.
The 1992 and older     "       "     "  short "     "      "       "     "    "    "     "  long.   I think this combo can work ?

I replaced my left spacer (sprocket side) with a short one (pre 1993). So now I have a short spacer on each side. Giving me tons of room for washers/spacers to adjust the wheel/tire for center tracking and chain alignment.

I use the terms "short" and "long" for the width to avoid all the math :).  But I do have some measurements if needed.

Just throwing some information into the pile for what ever it's worth.
George
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: giantkiller on February 28, 2013, 11:34:11 PM
Sorry Brian didn't realise you were talking to Machv.
Title: Re: 89 rear wheel conversion. Very confused, so a few direct questions...
Post by: keand3 on February 28, 2013, 11:54:54 PM
I would. In a heart beat :good2: